Question # 1

The rate change of area expressed is expressed in:

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m²s^-1

ms^-2

m²s^-2

ms^-1

None of these

The frequency of free vibrations is known as

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free frequency

forced frequency

natural frequency

un-natural frequency

The least distance of distinct vision is:

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10 cm

25 cm

50 cm

100 cm

When a nucleus emits an alpha particles, its charge number decreases by

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3

2

6

5

If a 40 watt light bulb burns for 2 hours. how much heat is generated

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288 x 10³J

288 x 10⁸J

288 x 10⁵J

288 x 10⁶J

Such an inductor coil which does not consume energy and is often employed for controlling a.c. without consumption of energy is called

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Choke

impedance

Semi-conductor

None

According to the Bernoulli's theorem the pressure velocity are

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equal to each other

proportional to each other

inversely proportional to each other

none of them

The temperature of gas is produced by

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At potential energy of its molecules

The kinetic energy of its molecules

The attractive force between its molecules

The repulsive force between its molecules

When a water droplet falls through air, the net force on it is

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Net force = drag force - weight

Net force = weight - drag force

Net force = drag force + weight

Net force = weight + drag force

A convex lens acts as diverging lens when the object is placed:

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Between F and 2F

At 2F

With focal length

Beyond 2F

Waves transport energy

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without transport energy

with matter

both of them

none of them

The time rate of change of velocity is called

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Initial velocity

Uniform velocity

Accelerations

None of these

A force passing through the center of gravity of a body

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Results only in rotational motion

Results only in translational motion

Holds the body in equilibrium

None

The heart of machine is

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Lamp and camera unit

Aluminium drum

Charging unit

All of them

X-ray crystallography can be used to get what information about the structure of a compound?

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the bond angles in a molecules

the number of molecules per unit cell

a picture of the electron density in a unit

all of them

The distance between the two adjacent slits is called

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Thickness of the slit

Distance between and two slits

Grating element

None of these

The relative permitivity ∈_r for teflon is

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2.1

2.4

2.9

3.0

The word amorphous means:

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Without any structure

With define structure

Regular arrangement of molecules

Both B and C

None of these

Avogadro number is the no of molecules present in

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One liter of gas at STP

22.4 liter of gas at STP

22.4 mole of gas at STP

48.8 liter of gas at STP

When a mirror of a Michelsion's interferometor is moved a distance of 0.5 mm, 2000 fringes are observed, the wavelength of the light used is

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5000 mm

5000°A

500 cm

2000°A

The typical speed of has working aunt is

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0.1 ms^-1

0.01 ms^-1

0.001 ms^-1

0.025 ms^-1

The equations for uniformly accelerated motion can also be applied to free fall motion of the objects by

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V_f = 0

Simple 'a'

a by g

None of these

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